Detection of iBrowser, iRapp
Detect Windows NT 6.3 as Windows 8.1
Corrects detection of Symbian-OS
Merge pull request #364 from commenthol/ossymbian

Corrects detection of Symbian-OS
Better detection of iOS from In-App Browsing
Merge pull request #358 from commenthol/ibrowserirapp

Detection of iBrowser, iRapp
Merge pull request #363 from commenthol/oswin8.1

Detect Windows NT 6.3 as Windows 8.1
Merge pull request #365 from commenthol/osiosapp

Better detection of iOS from In-App Browsing
Better detection of Android Version; Simplified regex